CHAPTER LXXI.

THE "LIGHTNING." After having carefully closed the door behind him, Mordaunt, sheathing his sword, glided through the subterranean passage; but as be approached the neighbouring house, he stopped to examine himself. "Good," said he, "a mere nothing. Scratches, that is all. Now to my work." He walked on at a quick pace, till he reached a neighbouring cavalry-barrack, where he happened to be known. Here he borrowed a horse, the best in the stables, and in a short space of time was at Greenwich. "Good," said he, as he…